{"action":"opened","issue":{"url":"https://api.github.com/repos/PaddlePaddle/Paddle/issues/5013","repository_url":"https://api.github.com/repos/PaddlePaddle/Paddle","labels_url":"https://api.github.com/repos/PaddlePaddle/Paddle/issues/5013/labels{/name}","comments_url":"https://api.github.com/repos/PaddlePaddle/Paddle/issues/5013/comments","events_url":"https://api.github.com/repos/PaddlePaddle/Paddle/issues/5013/events","html_url":"https://github.com/PaddlePaddle/Paddle/issues/5013","id":267593512,"number":5013,"title":"ExpandLayer get wrong result","user":{"login":"wanghaoshuang","id":7534971,"avatar_url":"https://avatars0.githubusercontent.com/u/7534971?v=4","gravatar_id":"","url":"https://api.github.com/users/wanghaoshuang","html_url":"https://github.com/wanghaoshuang","followers_url":"https://api.github.com/users/wanghaoshuang/followers","following_url":"https://api.github.com/users/wanghaoshuang/following{/other_user}","gists_url":"https://api.github.com/users/wanghaoshuang/gists{/gist_id}","starred_url":"https://api.github.com/users/wanghaoshuang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wanghaoshuang/subscriptions","organizations_url":"https://api.github.com/users/wanghaoshuang/orgs","repos_url":"https://api.github.com/users/wanghaoshuang/repos","events_url":"https://api.github.com/users/wanghaoshuang/events{/privacy}","received_events_url":"https://api.github.com/users/wanghaoshuang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-10-23T09:08:30Z","updated_at":"2017-10-23T09:08:30Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"```\r\ninput(x):\r\nseq = [a, b], [c]\r\nseq_starts = [0, 2, 3]\r\n\r\ninput(y):\r\nseq_starts = [0, 2, 3, 5]\r\nsub_seq_starts = [0, 3, 5]\r\n\r\noutput = ?\r\n```\r\n\r\n我按原[paddle expad layer](https://github.com/PaddlePaddle/Paddle/blob/develop/paddle/gserver/layers/ExpandLayer.cpp)的计算方法，得到：\r\n[[a, a], [a]], [[b, b]]\r\n\r\n这个结果貌似是不对的\r\n"}}
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